Portable drilling apparatus



July 22, 1952 K L, F; wlLsON 2,604,304

PORTABLE DRILLING APPARATUS Piled Jan. 7, 1949 2 SHEETS-SHEET 1 FVG. l.

INVENTOR. E0/v fr. w/so/V,

July 22, 1952 F. wlLsoN PORTABLE DRILLING PPARATUS Filed "Jan, 7, 1949 2 vsHEFz'rs-SHEET 2 l.m1/Emme. Eo/v F.' WM SCD/V,

IQTTOE/VEYS Patented July 22, 12952 UNITED STATES PATENT OFFICE PGRTABLE DRILLING APPARATUS Leon F. Wilson, Clarksburg, W. Va,

Application January 7, 1949, Serial No. 69,737

(Cl. Z55-20) 2 Claims. 1 i

This invention relates to a portable drilling apparatus Which is adapted particularly for drilling passages in veinsof coal mines.

An object of the invention is the provision of a drilling apparatus mounted on a carriage which has rearwardly extending arms forV movi-ng and guiding the carriage, said arms being adapted to be retained in an elevated position, when at rest, by a prop swingably supported from the arms, a strap connected to the free end of the prop adapted to be engaged by the body of the operator when said prop has been raised for aiding in propelling the carriage forwardly and for forcing a bit which is revolved by a motor into an obstacle.

A further object of the invention is the provision of a drilling apparatus mounted on aV carriage which is propelled forwardly by a means on the free end of a supporting prop for the guiding arms of the carriage when the carriage is at rest, said prop being shifted to an elevated position during the forward propulsion movement of the carriage when a drill bit extending from a motor is projected into a coal vein or other mass of materials, there being means mounted on an arm and the carriage for supportingV the drill bit in an inoperative position during transportation.

The invention is best understood from a consideration of the following detailed description in connection with the accompanying drawings. Nevertheless, it is to be understood that the invention is not confined to the disclosure but is susceptible of such changes and modifications as shall dene no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings:

Figure 1 is a plan View of my portable drilling machine showing the drill bit in operative relation with a motor mounted on a wheeled carriage,

Figure 2 is a longitudinal side View of the drilling machine,

Figure 3 is a front end View in elevation of the machine,

Figure 4 is an enlarged fragmentary rear View in elevation of the supporting frame for the motor,

Figure 5 is an enlarged fragmentary vertical section taken along the line 5 5 of Figure 4,

`Figure 6 is an enlarged fragmentary vertical section taken along the line 6-6 of Figure 1,

Figure 7 is an enlarged front view in elevation of a clamping device for supporting one end of a drill bit showing said device in detached relation,

Figure 8 is an enlarged detached end view in elevation of the clamping device,

Figure 9` is an enlarged fragmentary vertical section of the lower end of a supporting prop, and

Figure 10 is a fragmentary rear View in elevation of the prop shown in Figure 9 with parts broken away.

Referring more particularly to the drawings I5 designates an axle supported by rubber-tired Wheels I6. A pair of guiding arms I'l are welded at their lower ends to a channel iron I8 which, in turn, is welded to the axle. The outer upper ends of the arms are iiared as shown at I9 and terminate in hand grips 20. A brace bar 2| connects the intermediate portions of the arms together.

An engine 25 is supported by a semi-circular saddle 26 having offset horizontal flanges 21 from which rise vertical extensions 28 Welded at 29 to the underfaces of the arms Il (Figure 4). A semi-circular clamp vSil embraces the top of the motor and has a horizontal flange 3| over one flange 2l. Bolts 32 connect the flanges together. Perforated ears 33 secured to the other flange 2l receive the ends of a bail 34 supported by a Ibearing 35 on the clamp 30.

A chuck casing and bearing 36 project forwardly of the motor housing to receive the inner end of a bit 31. The bit projects freely from the casing and is adapted to be tilted at various angles when drilling into a vein of coal and when the arms I'I are rocked by the operator.

A combined prop and propelling means or frame 39 includes a pair of legs 40 which are secured at the inner ends to collars 4I rotatable on the brace bar 24| for the arms I'I. A brace bar lilla connects the inner ends of the legs 4S together while the outer ends of said legs are connected together by a brace bar 42 adjacent a brace bar 43 connected between the divergent portions I9 of the arms Il. A belt 44 has its ends connected to laterally projecting lugs 45 rigid with rods 46 received by the hollow ends of the legs 40. Said rods are adjusted along the length of the legs by the pins 4l received in any one of a plurality of transverse passages 48 in said rods and also by openings in the legs. The pins are supported by chains 50 secured to the legs. When the bracket including the legs 40 is used as a prop to support the arms I'I in an elevated. position, the sharp pointed ends 5I of the'legs Will engage the floor of a mine. A catch 3 52 having one end pivoted at 53 on the clamp 30 engages over the brace bar for retaining the prop in position. When the vehicle is moved forwardly during the drilling operation the body of the operator is pressed against the belt 44 for aiding in forcing the drill into the coal. At this ti-me the catch 52 has been released and the prop is raised to the dotted line position shown in Figure 2, in which position it will be limited against furtherv upward swinging movement by the brace bar 43, as seen from Figures 1 and 2, and will be engaged by said brace bar at a location substantially in the plane of the inclined handles I1.

Metal straps are bent to form a circular seat 55 for supporting one end of the drill 31 when not in use. The free ends of the straps are joined together by a clamp 56. The free end of one strap is extended beyond the clamp and is curled around a divergent portion I9 of an arm I1 as shown at 51 for supporting the seat on said arm. The other ends of the straps are hingedly joined at 58.

An angle iron 60 has its lower end welded to the channel iron I8 on the axle l5 and rises vertically therefrom. A flange 6| extending laterally from the upper end of the member 60 has an opening to receive a bolt 52 projecting downwardly from one end of a clamp 63 pivoted at 84 on ears 65 projecting upwardly from the flange 6l. A nut 66 is threaded on the bolt 62 for drawing the clamp up tight on one end oi the drill 31 when the other end of said drill is received by the seat 55. A handle 61 is employed for operating the clamp 63.

A hook 68 is swingably mounted on the brace bar 43 (Figure 3). This hook is adapted to receive the brace 42 on the legs 40 of the prop for supporting said prop in an elevated position when the belt 44 is employed for aiding in propelling the drill 31 forwardly through solid materials. A hook 68a supports the hook 52 in an inoperative position.

A brace bar 69v has its opposite ends provided with depending lugs 1D received by perfor-ations in brackets 1I welded to the lower ends of the arms l1 (Figures 1 and 4). A semi-circular clamp 1I' embraces an intake pipe 12 of the engine and the ends of said clamp are connected to the bar G9 by devices which are identical with the devices employed for securing the semi-circular clamp in position. The clamps 30 and 1I cooperate to retain the engine or motor in position.

A throttle valve (not shown) (Figures l, 2 and 3) is operated by a lever 15 rigid with the operating shaft of the valve and the lever is rocked by a link 16 and a bell crank 11 pivoted at 18 on one of the vertical extensions 28. A rod 8D is connected between an arm of the bell crank and an arm of a manually actuated lever 8| is pivoted on a bracket 8| on the outer free end of one of the arms l1 when said lever may be grasped conveniently by the hand of the operator. An internal combustion engine as shown may be employed -for rotating the drill or an electric motor may be substituted therefor and in that event the lever 8| and the associated actuating elements will operate a switch.

The operation of my device is as follows: With n the drill bit 31 operatively connected to the engine 25, the wheeled carriage is moved forwardly by the hand grips 23 and the pressure of the body of the operator on the belt or leather strap 44. It will be appreciated that during the drill- 4 ing operation, the prop 39 has been elevated and supported by the hook 68 receiving the bar 42 for retaining said prop in a propelling position. When the drilling operation has been completed the carriage and likewise the drill is withdrawn.

When the apparatus is idle, or when a particular drilling operation has been completed and the drill bit 31 is withdrawn from the drilled opening, the prop 39 is swung to the lowered position, Figure 2, and held therein by means of the hook 52. When the handles 20 are released, the prop 39 will prevent the apparatus from tilting over rearwardly.

When the carriage is transported, the drill bit 31 is removed from its operative position with the engine and is carried by the seat 55 and the clamp 63. The nut 66 (Figure 7) is screwed up tight for securing the forward end of said bit against slippage.

What I claim:

l. A portable drilling apparatus comprising a wheeled support; a motor mounted upon the support; a substantially horizontal, longitudinally extending drill bit connected with the motor and extending longitudinally and forwardly of the motor and wheeled support; a pair of laterally spaced, elongated, longitudinally and ,rearwardly extending upwardly inclined handles secured at one end to the wheeled support and having their lother ends disposed a substantial distance above and rearwardly of the support and drill bit; a brace bar secured at opposite ends to the handles to extend transversely therebetween and disposed substantially medially between opposite ends of the handles; a second brace bar secured at opposite ends to the handles to extend transversely therebetween and disposed substantially medially between the first-named bar and said other ends of the handles; laterally spaced longitudinal side bars arranged between the handles and pivotally secured at one end to the first-named bar to swing upwardly and downwardly in a vertical plane between extreme operative and inoperative positions, said side bars in their operative extreme position extending longitudinally of and substantially in the plane of the handles and being engaged against upward swinging movement beyond said plane by the second-named brace bar, `the side bars in their inoperative extreme position extending outwardly and downwardly from the handles; and a transverse strap connected at opposite ends to and extending between the other ends of the side bars to receive pressure from the body of an operator and transmit said pressure to the support through the side bars and handles.

2. A portable drilling apparatus comprising a wheeled support; a motor mounted upon the support; a substantially horizontal, longitudinally extending drill bit connected with the motor and extending longitudinally and forwardly of the motor and wheeled support; a pair of laterally spaced, elongated, longitudinally and rearwardly extending upwardly inclined handles secured at one end to the wheeled support and having their other ends disposed a substantial distance above and rearwardly of the support and drill bit; a brace bar secured at opposite ends to the handles to extend transversely therebetween and disposed substantially medially between opposite ends of the handles; a second brace bar secured at opposite ends to the handles to extend transversely therebetween and disposed substantially medially between the first-named bar and said other ends of the handles; laterally spaced, tubular,

handles and pivotally secured at one end to the v first-named bar to swing upwardly and downwardly in a vertical plane between extreme operative and inoperative positions, said side bars in their operative extreme position extending longitudinally of and substantially in the plane of the handles and being engaged against upward swinging movement beyond said plane by the secondnamed brace bar, the side bars in their inoperative extreme position extending outwardly and downwardly from the handles; rods telescoping in the other ends of the side bars for adjustment longitudinally thereof substantially in the plane of the handles; means for retaining the rods against movement relative to the side bars from selected positions to which they are adjusted; and a transverse strap connected at opposite ends to and extending between said rods to receive pressure from the body of an operator and transmit said pressure to the support through the side bars and handles.

LEON F. WILSON.

6 REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 543,378 Dillon July 23, 1895 876,542 Haight Jan. 14, 1908 1,266,964 Lopour May 21, 1918 1,323,082 Mauldin Nov. 25, 1919 1,661,956 Nagy Mar. 6, 1928 1,823,446 Hansen Sept. 15, 1931 2,104,323 Hirschberg Jan. 4, 1938 2,166,905 Lear Aug. 8, 1939 2,435,192 Arsneau Feb. 3, 1948 FOREIGN PATENTS Number Country Date 188,674 Great Britain Apr. 12, 1923 383,623 Germany Oct. 15, 1923 OTHER REFERENCES The Rock Master. October 1934. 

